Chatham County, North Carolina: drinking water report. Chatham County sits between the Triangle and Triad regions, home to about 80,000 residents.
Chatham County sits between the Triangle and Triad regions, home to about 80,000 residents. Water comes from the Haw River and Jordan Lake, with several small community systems serving different parts of the county. Chatham's rapid growth as a Triangle suburb has increased both water demand and development pressure on the watershed.
Jordan Lake, a primary drinking water source for the region, has been under nutrient management restrictions due to algal growth from upstream development. UCMR5 data shows low-level PFAS detections in some county systems. According to NC DEQ monitoring, Jordan Lake's nutrient levels have been a persistent regulatory concern.
The county's mix of agricultural land and new residential development creates both nutrient loading and impervious surface runoff that affect source water quality.
Chatham County's growth and Jordan Lake's nutrient challenges make water quality worth monitoring.
Check your water for data in your area. A carbon filter handles taste and DBPs. Our water filter guide covers options. Pull your detailed report, and visit our North Carolina page for statewide data.
Drinking water is one exposure route. These federal datasets also cover Chatham County, NC.
The EPA places Chatham County, NC in Zone 3 - the EPA's lowest-risk category, with a predicted average indoor radon level below 2 pCi/L. Zone maps predict an area's radon potential from geology and existing indoor readings; they say nothing about a specific house. Testing is the only way to know your own level.
28% of homes in Chatham County, NC were built before 1980, and 6% before 1950. Residential lead paint was banned in 1978, so housing age is the strongest available proxy for lead-paint exposure. This describes the county's housing stock, not any one home.
Modelled annual fine-particle pollution (PM2.5) in Chatham County, NC averages 7.7 µg/m³, within the EPA's annual standard of 9 µg/m³. These are CDC modelled county estimates rather than readings from a specific monitor.
How radon zones work · Air quality by county · Lead exposure guide